Uniswap - Could not determine the value of this sale

What’s the correct procedure for fixing these types of errors on uniswap transactions?

“Could not determine the value of this sale - we don’t know the price of ONX on Dec 23, 2020 - please add the fiat value received or mark it as a transfer.”

I’m seeing this issue as well for a Uniswap trade from ETH to an ERC20 token (YAXIS). It’s categorizing it as a “Sell” (when I think it should be a “Trade”) and just says “Could not determine the value of this sale”.

Were you able to fix it?